Transport Belt Reskin Functions
The following are a series of data-stage global functions that can be called by other mods to return tinted graphics sets and create and apply tinted transport belt remnants.

Transport belt icons
Returns a complete icons definition (Types/IconData). Call by assignment to a variable, for example:
data.raw["transport-belt"][your_transport_belt_name].icons = prismatic_belts.transport_belt_icon(tint)

prismatic_belts.transport_belt_icon(tint)
    tint      Types/Color; color to tint the icon

Transport belt animation set
Returns a complete Prototype/TransportBelt#belt_animation_set definition. Call by assignment to a variable, for example:
data.raw["transport-belt"][your_transport_belt_name].belt_animation_set = prismatic_belts.transport_belt_animation_set(inputs)

prismatic_belts.transport_belt_animation_set(inputs)
    inputs    Table; contains some or all of the following parameters:
     > base_tint          Types/Color; color to tint the base sprite (gears, rails). Optional.
     > mask_tint          Types/Color; color to tint the mask sprite (belt surface, arrows). Recommended.
     > brighten_arrows    Boolean; use when the arrows on the belt for a given tint are darker than you would like.
     > variant            Integer (1|2); controls which sprite sheet to use (1 for slower, 2 for faster)

Transport belt remnants
Reskins existing remnants, or if no remnants are found, will create and appropriately assign remnants. Call directly without assignment.

prismatic_belts.create_remnant(name, inputs)
    name      String; prototype name of the transport belt entity
    inputs    Table; contains some or all of the following parameters:
     > base_tint          Types/Color; color to tint the base sprite (gears, rails). Optional.
     > mask_tint          Types/Color; color to tint the mask sprite (belt surface, arrows). Recommended.
     > brighten_arrows    Boolean; use when the arrows on the belt for a given tint are darker than you would like.